Process of producing a repair in fabrics



A. O. AUSTIN.

PROCESS OF PRODUCING A REPAIR IN FABRICS,

APPLICATION FILED MAY 12, 1920.

1,424,832. Patented Aug. 1, 1922.

ARTHUR 0. AUSTIN, 0F BARBERTON, OEIO, AQQIGNGR, FY MESNE Assrcnrmnrs, To

-'II-IE OHIO BRASS COMPANY, OF MANSFIELD, OHIO, A CORPORATION 015 JERSEY.

ineaaae.

Application filed May 12, 1920.

T 0 all whomz't may concern:

Be it known that I, ARTHUR U. Aus'r n,

State of Ohio, have invented certain new and useful Improvements in Processesof Producing a Repair in Fabrics, of which the following-is a specification. 3 g

This inventionhas for its objectthe provision of means for repairing fabrics and especially. fabrics of what are known as filter press sacks, so that sald sacks when repairedshall retain their usefulness.

Another object of the invention is to provide an improved process for produc ng such repairs.

, The. inventionis exemplified in the combination and arrangement of parts shown in the accompanying drawing and described in the following specification, andals'o in the steps of the process described in the spec1- fication.

The invention is more particularly pointed out in the appended claims.

Tnthe drawing- Fig. 1 is afragmentary vertical section illustrating diagrammatically a filter press with filter press sacks in place. a

Fig. 2 is a transverse section-of the structure shown in Fig. 1.

Fig. 3 is a fragmentary View showing one corner of the press sack which has been worn I use. Fig. 4 shows the sameprees sack after it has been repaired. Figs. 3 and 4 areboth somewhat diagrammatic. 1

Fig. 5 is a diagrammatic vertical section of a vulcanizer illustrating one step in'the process of repairing press sacks.

In the preparation of various substances for commercial use, such as the clay from which porcelain articles are manufactured, the material is mixed with water in order to secure a uniform mixture and is then placed in a filter press by means of which the water is expelled under pressure from the mixture leaving the clay in a plastic state. A portion of such a press is shown diagrammatically in Fig. 1 in which the numeral 10 designates the plates of the press Specification of Letters Patent.

rename or Pnon'crcme A. aerate In. FABRICs.

Patented Aug. 1, 1922. serial in. sweet.

tudinally of the press and mechanism, not shown, lsprovided for clamping the plates against one another. A filter sack, shown at let, comprises a pair of fabric sheets, one of which hes on each side of a plate 10, the two sheets belng secured together at the opening 11 and having the outer edges clamped between the enlarged ortions 12 of the lat s .10. The sheets 14: p 6

may be removed from the plates loafter the plates areseparated from one another by drawing one of the sheets 1a through the opening-'11. In assembling the press ready for operation, the filter sack is placed upon the plate by first feeding one of the two attached sheetsof the sack through an openlng in the plate 10 and then spreadmg the two sheets over opposite sides of the plate. The plates are then clamped together so that the edges of sacks on adjacent sides of contlguous plates are clamped between the ad acent rlms of the plates. The mate rialto be filtered is then fed, under pressure, through the openings 11-into the various chambers of the press and will force the fab ric. of the sacks against the walls of the plates 10 and cause the water to be filtered through the fabric and to escape through ducts 15 provided for that purpose; The surfaces of the plates may also be provided with radially extending grooves to facilitate the escape of the water from the mixture. The plates must be clamped sufliciently tight against the edges of the sacku toprevent anyleakage between the cooperating rims of the plates.

filter press plateswhile the remaining portion of the sack is practically unworn. It

will be readily seen that when this occurs the mixture within the press will escape at the places where the sack is worn and thus impair the efiiciency of the press and give rise toloss of material. Heretofore it has been impossible to repair a sack thus worn for the reason that any patch placed upon the sack produces an unevenness in the thickness of the fabric so that it is impossible to procure a tight joint by clamping the fabric between the rims of the press plates. Under the present invention a sack having a frayed place or small opening, such as is illustrated at 16 in Fig. 3 of the drawing, is repaired byfilling the opening or we r frayed place with rubber or other material which can readily be cured or hardened by heat or chemical means.

The repairing is preferably done on a steam-heated vulcanizing table or between surfaces which 'Wlll squeeze down the repairing material to the same thickness as the press sack. The method of operation is illustrated-in Fig. 5 in which 17 and 18 are the two plates of a vulcanizer having the sack 14 to be repaired in position between the plates. If a comparatively large opening, like that shown at. 19 in Fig. 3, is to be repaired, a piece of fabric 20 of the same thickness as the sack, and cut to conform roughly to the shape of the opening, is placed in the opening, and the space between the edges of the patch and the edges of the opening is filled with the vulcanizinv material as shown at 21 in Fig. 5 of the drawing. If'the holeis smaller, it may be completely filled with the vulcanizing material as shown at 22 in Fig. 4. After the parts have been clamped between the plates 17 and 18 of the vulcanizing press and the vulcanizing material has been sufliciently cured, the patch 20 will be firmly held in place and form a continuation of the fabric of the sack. The repaired portion will be of the same thickness as that of the original fabric and there will be no thickened portions to permit leakage of the substance to be filtered when the sack is in place in the filter press. By using rubber or other material which will adhere to the fibers of the press sack or filter cloth, it is possible to repair either large or small holes with ease, and in practically any place on the filter cloth, as the thickness of the cloth is not altered. Where rubber is used the cur: ing may be performed by applying heat to cure the rubber cement or rubber stock when heated, or the rubber may be cured by the socalled acid cure or any other. By this process a repair may be effected without increasing the thickness of the filter sack and furthermore, the method may be used to join sacks of a filter fabric of the same or different textures. The vulcanizing method may also be used to prevent raveling and to eliminate sewing in complicated press sacks.

I claim:

l. The method of repairing fabric of filter press sacks or other articles which comprises the insertion of vulcanizable material in the portion of the fabric to be repaired, and curin said material to cause it to adhere to said fabric and form a continuation of the body thereof. j

2. The method of repairing fabric of press sacks and other articles comprising the insertion of vulcanizing material in the fabric to-be repaired, holding said material and fabric between two surfaces to impart to and other articles which comprises the insertion of a piece of fabric within an opening to be repaired so that said piece of fabric has the faces thereof substantially flush with the surface of the fabric of said sack and so that the edges of the inserted piece lie opposite and do not overlap the edges of the fabric of said sack, and securing said piece of fabric in place in the opening in said sack by vulcanizable material.

1. The process of repairing filter sacks and other articles comprising the insertion of, a section of fabric into an opening in the article to be repaired, said section being shaped to conform approximately to the shape of said opening and lying wholly within said opening, and securing said section in position in said opening by means of vulcanizable material distributed about the edge of said section and adhering to the edge thereof and the adjacent edge of the opening in the article to be repaired.

I 5. The process of repairing filter sacks and other articles comprising the insertion of a section of material within an opening to be repaired so that said section of material lies entirely within said opening without overlapping, and securing said section of material in place in said opening by a. vulcanizable substance and curing said substance between adjacent faces of a press to impart to said vulcanizable substance the same thickness as the repaired article.

6. The process of repairing an opening in the fabric of a filter press sack comprising the insertion of vulcanizable material in said opening, and curing said material between adjacent faces of a vulcanizing press to, impart to the filling material in said'opening the same thickness as that of the fabric repaired thereby.

7 The process of repairing the fabric of filter press sacks and other articles comprising the insertion of vulcanizable material within an opening-in said fabric to be repaired, curing said vulcanizablematerial to cause it to adhere to the fibers of said fabric and be retained in place in said fabric, and maintaining said material substantially equal in thickness to the thickness of said fabric during said curing operation.

In testimony whereof I have signed my name to this specification on this 7th day of May, A. D. 1920.

ARTHUR o. AUSTIN. 

